Mozilla Firefox Free Download Latest Version

Firefox's features are robust and generally competitive. There is some minor functionality missing in a few cases where the browser remains behind the competition, but Firefox is generally one of the most progressive major browsers available, an early adopter if not always an innovator.
The most important feature in the modern Firefox is Sync. As with many recent Firefox features, it started off as a rough add-on, and often deleted data. If you were scared off by its early bad behavior, you'll be glad to know that Mozilla has worked out its birthing pains. Sync now smoothly syncs your bookmarks, passwords, preferences, history, and tabs, not only with other computers, but also with your Android version of Firefox.
To use it, click on the Menu button and choose Set Up Sync from the left column. That will take you to a window where you can connect an existing Firefox Sync account or create a new one. Within Firefox Sync, there are two important security points. One is that Firefox encrypts your data before sending it over an encrypted connection to its servers, where it remains encrypted. Mozilla says that the company would not be able to access it even if somebody there wanted to. The second is that you have the option of setting up your own personal sync server. In an age when private data stored by corporations gets hacked and stolen with shocking regularity, setting up a personal sync server is one way to ensure that you bear the responsibility for your own data.
Another big new feature in 2011 has been support for restartless add-ons. These add-ons are written differently from standard Firefox add-ons, and are expected to become the format for add-ons in the future. As such, relatively speaking, not many restartless add-ons exist--about 776 at the time of this review, compared with the thousands of "standard" add-ons. However, this is an improvement of more than 600 add-ons since Firefox 4 debuted in March 2011.

Add-ons continue to pose a big problem for Mozilla, as older add-ons become a bottleneck for Firefox that other browsers, with their newer add-on frameworks, don't have to manage. The Add-on SDK is designed to confront this problem directly. However, more than 80 percent of add-ons available will cease to have compatibility problems with Firefox when the problem was nothing more than the "maximum version number compatibility," the aforementioned security feature.

Firefox's add-on manager has been completely overhauled. There's a lot of useful new technology here, as compared with the version 3.6 manager. Not only can you search for add-ons from within the add-on window using the search box in the upper-right corner, you can add them without having to jump to the external Mozilla Add-on Web site, also known as AMO. The manager calls out the AMO add-on collections, which you can create more explicitly in the Get Add-ons tab. The add-on manager also allows you to browse Personas. It's slightly annoying that clicking on an add-on group or collection opens the page in a new browser window, whereas clicking on a specific add-on opens that add-on's download page within the add-on manager. That's a very minor criticism, though.

Other changes to the add-on manager include forward and back buttons specific to the manager, in the upper-left corner, and left-side navigation tabs specifically focusing on Extensions, Appearance, and Plug-ins. Meanwhile, two little improvements to the manager will impress keyboard junkies. There's a new hot key for pulling up the add-on manager, Control-Shift-A, and you can type "about:addons" directly into the location bar to access the add-ons manager in a tab. And of course, there's the third-party add-on guard as mentioned above.

More changes include Twitter as an option for Firefox's built-in search box, setting the browser to initially reload only the active tab after a crash, and an update to dragging tabs that makes it easier to identify them with simple animations.

The tab-grouping feature called Panorama presents your tabs as an array of thumbnail images. The thumbnails reside in rectangular boxes that constitute a group. Tabs can be dragged from one group to another, and groups can be named and moved as well. You can add a tab to an existing group or create a new group by right-clicking on the tab and choosing Move to Group. The hot-key combo Control-Shift-E will also jump between the main interface and the Tab Group window.

The overall idea is to make it easier to switch from one tab to another, to group or regroup related tabs, and to get a global view of what's going on with your tabs. It's potentially a big improvement in browser usage, compared with aiming a mouse at an ever-skinnier tab, cycling through a list with Alt-Tab keystrokes, or pecking at a drop-down menu to reach the tabs that overflowed off into the deep. Firefox 6 changed how Panorama interacted with the browser's memory management, so that tabs now load at launch only for the active group.

The Bookmarks and History menus have been redesigned, and now the hot keys open them by default as sidebars. Go through the Menu button to get the full menus. We were actually quite impressed with the layout of the menu button options for Bookmarks and History, finding it much more useful, with quick access to recently closed tabs and new bookmark tags. This is probably the most useful in-browser bookmark manager around, especially if you enable Sync and use it with your Android phone or tablet.

Another relatively new feature is App Tabs, which reduces the width of a tab to its favicon and pins the tab permanently on the left. The tab will glow when updated, a useful indicator for things like Web mail. And when you start typing into the location bar, one of the search choices will be related open tabs so that you can quickly switch to an existing tab.

Under the hood, Firefox is an much different critter. The biggest change is full hardware acceleration across all platforms, which means that Firefox draws on your graphics card to speed up complex rendering. You'll see dramatic HTML5 support, including for high-definition WebM video, and broad support for the HTML5 canvas, video, audio, geolocation, drag and drop, and form tags. OpenType fonts are supported, as are CSS3 and newer JavaScript values. WebGL and hardware acceleration give the browser a massive boost, which we'll discuss in the Performance section below.

The short version of all this is that Firefox is on the cutting edge of the next generation of Web standards, and that benefits you immensely by offering faster rendering times of Web sites that can do more.

A new Web Developer menu collates tools for building and debugging Web sites in one location. One such is the ScratchPad tool, which browsers like Opera and Chrome have had for some time. It allows developers to test JavaScript and CSS before implementing it. The Web console feature also has a new autocomplete option and can have its location customized.

There's a decent list of other, smaller changes to Firefox that are worth pointing out because they'll enhance your work flow in one way or another. One of these is Switch to Tab. Open a new tab and start typing the name of an already-open tab, and the URL will appear in the drop-down with "Switch to Tab" beneath it. Select that one, and the new tab closes and you're whisked to the pre-existing tab. It's a great trick for cutting down on the amount of time it takes to sift through 45 open tabs, and removes the chance of accidentally having the same tab open twice or more.

The location bar--or as Mozilla calls it, the Awesome Bar--retains familiar features, such as the options to search your history and bookmarks and to tap your default search engine to provide you with quick results. However, the "feeling lucky" instant jump to what the browser thinks is the Web site you're most likely to be looking for has been disabled because of internal Mozilla concerns about inadvertently sending personal information to the search provider.

The Do Not Track feature indicates via a header notification that you want to opt out of targeted advertisements. However, it requires that the Web site you're viewing, and therefore that site's developers, respect the header itself. While this is great for future-proofing the Web, as implemented at the time of writing, not many Web sites have taken notice of it. That doesn't mean it won't eventually have a big impact, but that time is not now, and it's better to install an add-on like Adblock Plus to get more complete ad-tracking protection.

There are two smaller yet important changes to the way that Firefox protects you. One is the Content Security Policy, which is designed to block one of the most common types of browser threats, cross-site scripting attacks, by allowing sites to tell the browser which content is legitimate. Though CSP also places the burden on the sites' developers, it's backward-compatible and aimed mostly at well-known sites hosting immense volumes of data and content.

Another security improvement is the implementation of HTTP Strict Transport Security (HSTS). This prevents your log-in information from being intercepted by telling Firefox to automatically create a secure connection to a site's servers.

The "identity block," the colored left-most section of the URL, has been given a refresh to better call out the Web site you're on, and the URL bar itself now changes the text color of the URL you're on so that the domain is black, for easy identification, while the rest of the URL is gray. This is a small security change, and one that's been previously available to people who are comfortable changing their about:config, but it's definitely a strong visual cue that helps you avoid getting spoofed.

The new feature set alone makes it worth upgrading to the latest version of Firefox. While some older Firefox users may feel that these features add unnecessary bloat to a browser that offers add-ons specifically so that you can customize your browsing experience, Firefox 4 was actually dramatically faster than Firefox 3.6, and there have been significant speed gains ever since. We address the browser's behavior in the section below.

You ought to see the memory improvements in Firefox 10 when the browser is kept open for long periods of time, when multiple tabs are open at once, and when the browser is used concurrently with other programs that also use a lot of memory. The company also noted that its MemShrink initiative was successful in part because of the rapid release cycle that a vocal minority of Firefox users have been criticizing.

Installing Firefox 10 prompts you to opt in to a new anonymous reporting measure called Telemetry. Not unlike security suites, which use your data anonymously to improve threat detection rates, Mozilla plans to crowdsource its performance data to learn more about how the browser performs in real-world situations. Unlike the security suites, Telemetry is opt-in, so Mozilla won't be collecting data without permission. Not surprisingly given Mozilla's reputation for openness, Telemetry is far more open about what it collects and why than similar features from competitors like Apple, Google, and Microsoft. Currently, it looks at four categories: memory usage, CPU core count, cycle collection times, and startup speed. Curious readers can install the About:telemetry add-on to see the personal statistics that Firefox is gathering.

If you've enabled Telemetry and would like to disable it, you can go to Options, Advanced, and uncheck the Submit Performance Data box at the bottom of the General tab.

JavaScript plays a major role in the Web, and changes to the JaegerMonkey engine combined with the GPU acceleration give the browser some serious juice. Ongoing improvements in browser technology make regular browser testing a challenge, but March 2011's browser benchmark battle placed Firefox 4 ahead of Chrome 11 and Internet Explorer 9. It wouldn't be surprising to find that Chrome and Firefox currently test much closer to each other because of their regular updates.

One interesting publicly available benchmark is JSGameBench from Facebook, which looks to test HTML5 in real-world gaming situations. JSGameBench hasn't posted new results since April 2011, but the ones it did post gave strong marks to the Firefox 4 beta both with and without WebGL. The stable version of Firefox 4 also did well in JSGameBench tests once it was released.

Note that to effectively use hardware acceleration, you must make sure that your graphics card drivers are up-to-date.

Browser benchmarks are a notoriously fidgety lot, and often come up against legitimate complaints that they look at too narrow a set of features--such as checking only JavaScript rendering times. In hands-on use, at least, Firefox 10 can more than hold its own. It's not clear that it's enough to counter the past three years of Chrome decisively winning the fastest-browser PR campaign, but that may no longer be the point. All five major browsers are now similarly fast at JavaScript tests, and you may want to start looking at other criteria to determine which browser is best for you.

In our experience, one of the most positive performance differences between Firefox 3.6 and the current version is that Firefox 10 crashes far, far less. That's due in no small part to improvements made to the plug-in crash protection, which prevents plug-ins like Adobe Flash, Apple QuickTime, and Microsoft Silverlight from dropping the browser dead. If one of them crashes, simply reload the page.

Conclusion
Definitely a worthy heir to the Firefox name, Firefox 10's one major drawback is that, like its competitors, it still uses massive amounts of RAM. Don't expect that to change as the browser is relied upon to perform more and more tasks that once occurred in other programs. However, it will be less of a problem as hardware improves and Mozilla continues to push initiatives like Telemetry and protection from third-party add-ons.

Firefox 10 faces a challenging and ever-advancing field of competition. Some people have probably abandoned Firefox because of the significant speed differences between version 3.6 and Google Chrome. Others might be turned off by Mozilla's open-armed embrace of the rapid-release cycle, and the diminishing importance of version numbers. Frankly, we find that a bit silly, as it's better to get newer features and fixes as soon as they're ready, instead of waiting for a once-yearly update. Competition has forced Mozilla and others to put out better browsers in order to thrive, and we think that Firefox 10 will keep the browser competitive.